Taiwan: a multi-locus test of the biogeographic and phylogenetic relationships of isolated populations of shrews

摘要: Aim Colonization of the Philippines from Taiwan or neighbouring areas Asian mainland has been proposed as an important source diversity for some plant and animal groups in northern Philippines. Previous inferences, however, were based on taxonomic groupings, which sometimes fail to reflect phylogenetic history. Here, we test colonization north a group shrews (Soricomorpha: Crocidura) using explicit inferences evolutionary Location Southeast Asia. Methods We estimate relationships populations Batan Sabtang islands DNA sequences two mitochondrial genes three nuclear loci. employ topology tests evaluate possible these species throughout Results find conclusive evidence that are closely related Crocidura tanakae additional specimens mainland. Bayesian frequentist alignments individual loci strongly reject any notion part main Philippine radiation Crocidura, indicating northernmost almost certainly colonized by Main conclusions Our results provide first compelling archipelago terrestrial vertebrate via route. Invasion shrews, did not lead further range expansion more southerly parts This study, combined with previous results, documents at least times. However, only one invasions led situ speciation ubiquity across archipelago. findings growing body literature suggesting oceanic archipelagos often multiple times species, occasionally